Australians woke Wednesday morning to a major outage affecting Telstra, the country’s largest telecommunications network.

But mobile phones weren’t the only thing knocked out of action.

Some EFTPOS payment services, taxi payment systems, electric vehicle charging platform Chargefox, and public transport ticketing in Canberra were all affected.

There have been conflicting reports over whether triple zero calls were impacted, as they were in the recent Optus outage.

Most notably, train services were affected in Victoria and NSW. Victoria’s regional train system, V/Line, suspended services across all lines due to the national Telstra outage.

Several hours into the outage, there was no estimated time for when trains would resume running, and limited bus replacements were available.

With the outage having started about 4.30am, this threw the morning commute into chaos for many.

But how does a mobile network crash affect trains? Let’s look at the underlying tech connections.

How do trains use a mobile network?

Trains have roof-mounted antennae that connect them with control centres. Voice and data communication between trains and control centres takes place on frequency channels that are used in mobile........

© The New Daily